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cmjohnson
Joined: 03 Apr 2006
Posts: 5180
Location: Buried under G90s
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| Posted: Thu Jan 14, 2010 4:19 pm Post subject: Marquee not storing contrast modulation settings? |
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My 9500LC has grown a mind of its own. Every time I shut it down and start it back up, my contrast modulation settings
for the red CRT come back up wrong. I readjust them and save them and when I shut down and restart, it's right back
where it was last time. It's like it's not saving the settings.
Everything else is just fine. I'm not losing any other settings, and I've done experiments with many adjustments to confirm that.
Any ideas? Why would it lose its memory just on one contrast modulation setting, and nothing else?
CJ
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Curt Palme
CRT Tech
Joined: 08 Mar 2006
Posts: 24396
Location: Langley, BC
TV/Projector: All of them!
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| Posted: Thu Jan 14, 2010 4:24 pm Post subject: |
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That's wierd! ARE you sure the memory location isn't locked in the menu? What does the battery measure on the CLM?
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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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cmjohnson
Joined: 03 Apr 2006
Posts: 5180
Location: Buried under G90s
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| Posted: Thu Jan 14, 2010 9:04 pm Post subject: |
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I specifically unlocked the memory, did the adjustment, and then relocked the memory. No difference.
I'm really not going to worry about it at this moment. I'm not far from taking the machine down and overhauling it and installing a stack
of improvements, and it only takes a minute for me to readjust the contrast modulation issue so for now I'll live with it.
One problem I'm experiencing seems to be the onset of yellowing in the blue CRT's LC chamber. The edges of a pure blue field are
starting to get a bit of a green tinge.
I need to buy a set of the new Apple bellows and start making my list of new caps to install.
CJ
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dturco
Joined: 06 Feb 2009
Posts: 3778
Location: Eastern Shore Maryland
TV/Projector: Runco DLP VX-3000i Marquee 9500 parts doner
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| Posted: Thu Jan 14, 2010 9:12 pm Post subject: |
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| cmjohnson wrote: | I specifically unlocked the memory, did the adjustment, and then relocked the memory. No difference.
I'm really not going to worry about it at this moment. I'm not far from taking the machine down and overhauling it and installing a stack
of improvements, and it only takes a minute for me to readjust the contrast modulation issue so for now I'll live with it.
One problem I'm experiencing seems to be the onset of yellowing in the blue CRT's LC chamber. The edges of a pure blue field are
starting to get a bit of a green tinge.
I need to buy a set of the new Apple bellows and start making my list of new caps to install.
CJ |
Nashou's bellows are great and you'll be amazed how much brighter the image will look with new Glycol.
_________________
Firefly rules. Can't stop the signal.
http://www.hulu.com/firefly
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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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| Posted: Thu Jan 14, 2010 9:15 pm Post subject: |
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I use panasonic FC or FM series, the Nichicons are good too. Also if you can find some OS-cons those can be used in certain places and with Os-Cons sometimes you dont need the same higher value as a lower one might actually work best as i found from my readings and research. Oscons work best for digital circuts.
Did you try a complete initialization?
\\
Athanasios
_________________
Don't blame your underwear for your crooked ass~ unknown Greek philosopher
"Republicans believe every day is the Fourth of July, but the Democrats believe every day is April 15." --- President Reagan
One Smart Dog!!!
Marquee High Performance Bellows now shipping!!
Marquee Modifications and Performance Enhancement
Marquee C-element and Bellow removal
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cmjohnson
Joined: 03 Apr 2006
Posts: 5180
Location: Buried under G90s
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| Posted: Thu Jan 14, 2010 11:06 pm Post subject: |
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| dturco wrote: |
Nashou's bellows are great and you'll be amazed how much brighter the image will look with new Glycol. |
That part won't be a surprise to me as I retubed this PJ in 2004 and put in new (VDC, Electrohome formulation) bellows at that time. I haven't put 400 hours on the tubes in that time.
Two are leaking...extremely slowly but the lens top cover does act as a drip pan. I'll be looking into options for painting
the chamber internal metal parts with an epoxy paint while I'm in there, something as chemically inert as possible,
to keep the glycol clean.
I have two gallon jugs of pre-mixed glycol, starting from Fisher Scientific glycol. I've got PLENTY. 
All lens mounting hardware will be replaced with stainless so it doesn't rust if it gets in contact with glycol.
I've got a perfect set of HD10Fs coming! The GT17s are great but I might as well go for the best!
(Incidentally, the Fs are the same lens as the revered HFQ900s.)
I once had a set of 900s. Brand spanking new in the original shipping boxes, with original receipts!
I made a nice profit on them but not nice enough! I wasn't running at high enough resolutions (at the time) to be able to really see the difference. Shoulda kept 'em!
What I'm doing here is nothing short of gearing up to upgrade my own machine to be among the ranks of the very
top grade machines running in anyone's home theater. It may not be THE best, but it will be on the A list for sure.
The optimized FrankenYoke Mark IIIs are a crucial part of this project. Adjusted to optimal magnetic strength
with optimal inductance values and adapted to the Marquee tube's magnetic stack with the greatest of care.
I'm even looking at the Marquee deflection yoke and wondering if there's a lot of room for improvement or substitution,
but that's nothing more than a vague idea right now. A yoke that's as good but shorter would give me more room
to precisely place everything on the tube neck where it gives the best results.
Something is confusing me a little bit...maybe someone has the answer for this.
I was examining the magnetics on a complete CRT assembly out of a Cine 8 Onyx, and I don't see a convergence
yoke. Does Barco integrate convergence into the deflection system?
CJ
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